Class AlgorithmParameterGeneratorSpi

This class defines the Service Provider Interface (SPI)
for the AlgorithmParameterGenerator class, which
is used to generate a set of parameters to be used with a certain algorithm.

All the abstract methods in this class must be implemented by each
cryptographic service provider who wishes to supply the implementation
of a parameter generator for a particular algorithm.

In case the client does not explicitly initialize the
AlgorithmParameterGenerator (via a call to an engineInit
method), each provider must supply (and document) a default initialization.
See the Keysize Restriction sections of the
JDK Providers
document for information on the AlgorithmParameterGenerator defaults
used by JDK providers.
However, note that defaults may vary across different providers.
Additionally, the default value for a provider may change in a future
version. Therefore, it is recommended to explicitly initialize the
AlgorithmParameterGenerator instead of relying on provider-specific defaults.